劉文勇GRE寫作Argument題庫 Day 91

Day 91 Three years ago, because of flooding at the Western Palean Wildlife Preserve, 100 lions and 100 western gazelles were moved to the East Palean Preserve

Three years ago, because of flooding at the Western Palean Wildlife Preserve, 100 lions and 100 western gazelles were moved to the East Palean Preserve, an area that is home to most of the same species that are found in the western preserve, though in larger numbers, and to the eastern gazelle, a close relative of the western gazelle. The only difference in climate is that the eastern preserve typically has slightly less rainfall. Unfortunately, after three years in the eastern preserve, the imported western gazelle population has been virtually eliminated. Since the slight reduction in rainfall cannot be the cause of the virtual elimination of western gazelle, their disappearance must have been caused by the larger number of predators in the eastern preserve.

Write a response in which you discuss what specific evidence is needed to evaluate the argument and explain how the evidence would weaken or strengthen the argument.

五問：

（1）“Three years ago, because of flooding at the Western Palean Wildlife Preserve, 100 lions and 100 western gazelles were moved to the East Palean Preserve, an area that is home to most of the same species that are found in the western preserve, though in larger numbers, and to the eastern gazelle, a close relative of the western gazelle. The only difference in climate is that the eastern preserve typically has slightly less rainfall. Unfortunately, after three years in the eastern preserve, the imported western gazelle population has been virtually eliminated”是事實(shí)，“ their disappearance must have been caused by the larger number of predators in the eastern preserve”是結(jié)論，值得反駁嗎？

（2）原文中所提及的氣候差異真的不是瞪羚減少的原因嗎？原文中是否給出了足夠的證據(jù)來說明這一點(diǎn)？比如瞪羚對于天氣變化不敏感等。

（3）東部和西部的兩種瞪羚之間是什么關(guān)系？是否可能是競爭者的關(guān)系？原文給出了足夠的信息來說明這一點(diǎn)嗎？西部瞪羚的數(shù)目減少是否可能是因?yàn)殡y以競爭過本土的東部瞪羚？

（4）原文所提及的因素共有兩個(gè)，其一是天氣狀況，其二是捕食者的數(shù)量，你能否想出其他可能會(huì)影響瞪羚種群的因素？（比如疾病等。）說說其他因素可能會(huì)如何影響瞪羚的數(shù)量？如果不討論這些因素，對原文的論述將會(huì)加強(qiáng)還是削弱呢？

（5）獅子和瞪羚之間是什么關(guān)系？是否就是捕食者與獵物之間的關(guān)系？遷徙到東部的動(dòng)物中有 100 lions and 100 western gazelles，因此討論的時(shí)候，是否也應(yīng)將獅子列入統(tǒng)一的討論范圍？